Are these rear view cameras going to be 3D? Has anyone even considered the disadvantage of losing any depth perception to the flat, 2 dimensional presentation of a video screen? I have trouble imagining the difficulty this would present in a backing situation. With a mirror, you can get a sense of depth and perspective to judge distances. A camera would just give a flat, detached representation of what was there. And perspective would be dependent on the focal length of the lens, among other things.